Gylaug of Halogaland

Gylaug of Halogaland was a pirate from Norway and the son of King Gudlog of Halogaland. In the 5th century CE, Gudlog was captured by Prince Jorund of the Swedes while raiding in Denmark and was slain, so Gylaug decided to avenge his father. He captured Jorund in battle during a raid on Sweden, and Gylaug had Jorund hanged.